This is one feature, which (if it helps at all) largely only helps with moving objects.

Otherwise m43 isn't falling behind at all. IMHO it continues to lead the market. It has the most native lenses, with a large number of high quality lenses. It offers a large number of features, such as anti shake and weather sealing, and a large number of bodies which should offer something for anyone - video or still. I don't see any reason whatsoever to be concerned. This is not to say that other manufacturers aren't doing interesting things - Fuji in particular. But left behind? No.